Cabin air filter system for a vehicle and method for cleaning air supplied to a vehicle cabin

A method for cleaning air to be supplied to a cabin of a vehicle, with a cabin air filter system, comprising:

• providing at least one particle filter element;
• and
• providing an adsorption filter element that is spatially separated from the particle filter element, the adsorption filter element comprising at least one adsorbent honeycomb;
• and
• providing at least one heating element adapted for heating the adsorption filter element for regeneration;
• and
• providing a bypass duct around the at least one particle filter element;
• and
• providing a bypass flap that is adapted to switch the bypass duct, wherein in a filtration mode an air flow is processable by the at least one particle filter element and in a bypass mode an air flow is bypassable through the bypass duct;
• and
• providing a regeneration flap, wherein the regeneration flap is adapted to switch a regeneration outlet to the environment;
• wherein the cabin air filter system is operable in a regeneration mode in that the adsorption filter element is regenerated;
• wherein in the regeneration mode:
• activating the heating element so that the adsorption filter element is heated to a temperature above a predefined regeneration temperature;
• and
• opening the regeneration outlet by the regeneration flap so that a regeneration air flow is processed by the adsorption filter element and released to the environment through the regeneration outlet.